Light-diffusive inclosure for light sources.



C. H. MYERS. LIGHT DIFFUSIVE INCLOSURE FOR LIGHT SOURCES.

nted June 17,1913.

APPLICATION I'll-ED MAB. 1, 1912 RENEWED HA3. 8, 1913.

Pate

INVENTOR WITNESSES ATTORNEY curve and the exterior coinpanii'in curve althe light source, so that light striking the ll'lTE CHARLES H. MYERS, OF BUFFALQ, NEW YORK.

LIGHT-DIFFUSI"E INCLOSURE FOR LIGHT SOURCES.

1,(65, li7. Specification of application filed March '1, 1812, Serial Z19 all whom it may concern Be it known that I, (humps H. runs, a citizen of the United States, residing at Bull'alo, in the county of Erie and State of New York, have invented a new and useful Lightdlifiueive Inclosure for Light Sources, of which the following is a specification.

This invention has reference to improvcmerits in light diffusive inclosures for light sources, and its object is to provide a lamp globe or closure for a source of light so conslructed that the light source appears though coextensive with the exterior walls of the globe or cloeure, thereby producing a marked dispersion of the light rays and greatlyenhancing the appearance of the closure, which latter it will. be understood is made of glass.

The light inolosing structure is composed of many glass cylinders arranged in a circle or some like arrangement and coalescing Where the cylinders if distinct would touch. The outer walls of the cylinders are cylinllrical, while the inner Walls attain the form of reenl ent curves with the axis of generation of the cylinder and the rccntrant curve in the same radial line with respect to the axis of the closure a Whole, the general arrangement being followedwhcther the closure be a simple cylinder, a bowl, a bulb, a globe, or of other form. VVha-tever be the diameter of the closure the rentrant Ways bear substantially the some relation to concaved interior surface of any portion of the closure will be refracted. to substantially the breadth of the exterior companion por l limited to any excel Letters P en Patented Junci7, 1913.

No. 680,797. Renewed March 8, 1913. Serial He. 753,077.

I thcnccompanying drawings forming apart fol this specification, but it will be further understood that the invention is susceptible of other practical forms than shown in the drawings, wherefore the inveniion in not conformity with the showing of the (lmwinqs, but may be ver oussly changed and modified long as changes mark no material deoareure from the salienl. features of the invention,

In i'he drawings z-l igure 1 is a longiiardine-l diametric section of a closure of cylindrical form construct-ed in accordance with the present invention. Fi 2 ie a cross section thereof. Fig. 3 is a iametric longitudinal section of a bowl-shaped globe constructed in accordance with the recent invention. Fig. 4 is a longituclina sectional an incandescent. electric light bulb constructed in accordance with the present invention. p

Referring to the drawings there is shown in F l and 2 a closure 1 made up of a circular series of coalescing elements 2,each of which may considered as a rod cylindrical in cross section with a rentrant curved portion 3 on one side and an arcehaped portion 4 opposite the curve 3. The are may he considered as struck from an axis coinciding with the longitudinal central axis of the rod 2 and hence Within its bounds, while the curve or are 3 struck from a shorter radius than the are 4, and the center of curvature of the curved portion 3 is outside the bounds of the cylinder 2, while the bisectcr of the are 4 if continued becomes also the bisector of the are 3 constituting the rentrant curve or are in the1nemtion, and the effect upon the eye is that of a broad band of light from each cylindrical mGITllJGI coalescing with that of others even though one member be viewed at a consid erably greater angle than another, each in j dividual convex portion of the exterior Wall of the closure being seemingly full of light, wherefore in the case of a cylindrical closure the effect is tlhat of a broad band of light of great intensity equal in extent to the visible portion of the cylinder, and with other shaped closures a similar effect is pro Y duced. Moreover, the light is very evenly distributed and besides being attractive is l utilizable to the best advantage.

The invention will be best understood her :2. The are 3 is also less extensive than he 4 and its degree of curvature is grealer; The are 4 if continued'inio a complete circle would embrace the rentrant are 3, and i n the-puncture shown in the drawinge each areglis divided from the adjacent curved on sections coinciding with the cen lore of generation of the corresponding arcs 4. All the cylindrical elements 2 coalesce so that if produced the meeting portions would overlap, wherefore the arcs 4 are each less than one hundred and eighty degrees, and the arcs 3 are still shorter.

An efi'ect similar to that produced by the structure just described when interior to the from a consideration of the follo'vying detailed description, taken in connection with cylinder 1 there is placed a source of light, would be produced were the elements 2 separc by a notch 5, the. walls of which. are

arate and distinct one from the other and simply brought into contact, but there would be so much interference with the transmis sion of light at the points of contact that dark lines would be formed interfering with the effect which it is desired should be produced. and these dark lines are eliminated by causing an apparent orerlapping of the cylindrical elements 2 as though fused and pressed together. The structure is also easily prmluceil by means of a mold of suitable shape permitting the formation of the continuous series of coalescing cylinders 2 with the arcs 3 and 4, at one operation.

No definite instructions can be given for the particular curvatures of the arcs 3 and 4 and the sizes of the cylindrical elements 2, since such features would vary with different qualities of glass and different sizes and shapes of closures. The result aimed at is that a light source, say an incandescent gas mantle, placed centrally within the cylinder 1 will be so related to the rentrant arts 3 that the light refracted by the curved surfaces represented by the arcs 3 .will spread to the edges of the surfaces represented by the arcs t, and pass therefrom in such lines that each whole cylindrical memher 2 is apparently filled with light and the visible portion of the cylinder 1 appears to glow as would an incandescent body of like extent.

The invention may be applied to a bowl 6 like that shown in Fig. 3, or an incandescent lamp bulb 7 shown in Fig. 4, and these two forms, as well as the form shown in Figs. 1 and 2, may be taken as indicative of any suitable configuration of the closure Where the principle of the invention may be applied.

The cross sectional area of the elements 2 varies directly with the diameter of the closure, these elements small in a closure of small diameter and proportionately lar'ge to the first named arcs, the second named arcs being of shorter length and curved on a shorter radius than the first named arcs.

2. A light (llflllSl'VG inc-losure for a source of light comprising a series of elongated lenshke elements arranged successively and integrally connected, the outer Wall of the structure being composed of a succession of each curved on a radius within theconfines of the thickness of t e structure and the inner wall being forum t as a series of reentrant arcs shorter than the first named arcs and each curved on a radius shorter than the first named arcs and outsi e the confines of the thickness of the struct re.

A light diffusive inclosure for a l; ht source comprising a circular series of lenslike elements integrally connected to form a hollow structure made up of elongated parts, the outer Wall of the structure being formed of a connected series of arcs each curved on a radius within the confines of the inner and outer walls of the connected series, and the inner wall containing a -like series of recntrant arcs shorter than the first named arcs and spaced one from the other and also curved on a shorter radius than the first. named arcs.

In testimony, that I claim the foregoing as my own, I have hereto affixed my signature in the presence of'two witnesses.

CHAS. H. MYERS. \Vitnesses Joan II. SIGGERS, Dwm R. Wscxm 

